Hello Niranjan, welcom to the forum, great that your first post is to share stuff!
But these do indeed need some more work.
What is your goal with them?
Why did you use animated custombrushes with only 2 frames for some of them, did you have a particular idea with that?

Also it is a good idea, if you post a panel of drawing tools, to add an image to the post in which we can see what the tools do.
So people can see if it might be worth for them to download.

Yes right. The brushes needed very more work. Which is why I mentioned "These brushes are not 100%" and I'll try to fix it if possible.
I wanted to share it because I was seeing plenty of people asking for custom "simulated" brushes. and I tried my best and I shared what I got.
"only 2 frames".. does it really matters!? all we need is a brush to animate. You can even animate with the default TVP pencil brush. But simulated brushes gives us the "feel" of drawing. What Else!
and yeah, I will add an image to the post when I fixed and updated these brushes. Thanks a lot speaking out

Storyboard, animation and design work : http://nathanotano.tumblr.com/
As I'm highly interested in animation workflows, I'm open to scripting new TVP functions for individuals and studios. Please don't hesitate to contact me!